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Solar Panel calculator

Unsure of what a solar installation will cost? Take out the guesswork with tailored answers in just a few clicks.

calculator

Why use our calculator?

With the rising cost of energy in the UK and an increasing focus on sustainability, installing solar panels is a smart investment for your home or business. Our Solar Panel Calculator takes the guesswork out of the process, providing you with tailored answers in just a few clicks.

How many solar panels will you need?

What size system is right for you?

How much money could you actually save?

Explore our installation costs

Ready to save with solar? We can help if you own your home and your roof isn't thatched.

Quick

More thorough

Hi ,
Besides saving money on your utility bill, what else motivates you to go solar?
(please choose one)

Be more Green

Use more Power
Guilt Free
(i.e. AC/Devices)

Fear of Outages
(i.e. Grid Down)

Cash in on 'Going
Solar' Incentives

What best describes you?

I’m retired or dreaming of retirement

I just bought my first home

I’m ready to start my career/family

My kids are in college

Fill in the blank. "When picking a solar partner, getting the best is most important to me."
(please choose one)

Warranty

Value

Technology

Company

What Solution would you like?

Solar PV only

Solar PV

+ Storage

Solar PV

+ EV

Solar PV

+ Storage

+ EV

What best describes you?

I have an EV

I want an EV

What's your address?

I want solar and I have an EV

Good for you! Let's find out how much power you need to offset your utility bill.

Average Daily Commute In Miles

Enter EV Range on Full Charge

EV Battery Size

Use slider to select EV Battery Size in kWh

Your battery size depends on your EV model. Don't know your battery size? Ask Google!

I want solar and I want an EV

Good for you! Let's calculate your daily kWh based on your average commute and type of EV you're acquiring.

Average Daily Commute In Miles

Choose the type of EV:

Small

Medium

SUV

Average monthly electricity Bill £

I acknowledge that Fit Solar is not providing a quote. It is a range to give me an idea of the system size and potential savings.

We're calculating your system size

Recommended System Size

To power your EV you'll require: kWh per day

based on current utility rate

per day

per month

per year

Estimating from your electricity bill, you require

To cover your existing utility bill + electric vehicle which is already being included in your monthly utility bill you need the following system size.

To cover your existing utility bill + future electric vehicle you will require:

Number of Panels:

System size:

Battery:

Potential savings:

Keep in Mind

This is for ideal situations, but you may need more or less panels

Keep in Mind

This is for ideal situations, but you may need more or less panels

Initial results are 100% offset. Your needs may vary. Try moving the slider to see additional options.

Current bill: New offset bill:

<100%>

Increase your offset to meet the minimum required kWh

Possible reasons to decrease:

Limited roof-space
Heavily shaded roof
Financial constraints/budget

Possible reasons to increase:

Adding electric vehicles or charging stations
Desire to use additional AC/heat/power
Planned renovation/expansion

Possible reasons to decrease:

Limited roof-space
Heavily shaded roof
Financial constraints/budget

Possible reasons to increase:

Adding electric vehicle
Desire to use additional AC/heat
Planned home renovation/expansion

Opt-in to receiving promotional messages. Don't worry, we won't share it with third parties.

Environmental Impact ( years)

metric tons

offset of your bill.

Number of Panels:

System size:

Battery:

Potential savings:

How do you plan on aquiring your system?

Cash Purchase

Financing

Lease

offset of your bill.

Number of Panels:

System size:

Battery:

Potential savings:

Your system is being calculated

Outright puchase

Available Incentives:
Cost Range of Your System
Payback Period (ROI): years

Financing (Loan)

Your new electric bill with solar per month :
Available Incentives:
Cost Range of Your System
:
Payback Period (ROI): years

Term:

Rate:

Credit Score:

Financing (Lease)

Your new electric bill with solar per month :

Term:

Rate:

Credit Score:

Environmental Impact
( years)

metric tons

I'd like to learn more about battery storage

offset of your bill.

Number of Panels:

System size:

Battery:

Potential savings:

Book your appointment

We always carry out a site survey to ensure you can get the best from your investment.

Please select one:

Call me

Virtual meeting / send a link

In person meeting

All personal information is confidential.

Pick a date

Pick time (Select date to get available slots)

Thanks

We look forward to speaking with you soon.

Step 1/

What Solution would you like?

Solar PV only

Solar PV

+ Storage

Solar PV

+ EV

Solar PV

+ Storage

+ EV

What best describes you?

I have an EV

I want an EV

What's your address?

I want solar and I have an EV

Good for you! Let's find out how much power you need to offset your utility bill.

Average Daily Commute In Miles

Enter EV Range on Full Charge

EV Battery Size

Use slider to select EV Battery Size in kWh

Your battery size depends on your EV model. Don't know your battery size? Ask Google!

I want solar and I want an EV

Good for you! Let's calculate your daily kWh based on your average commute and type of EV you're acquiring.

Average Daily Commute In Miles

Choose the type of EV:

Small

Medium

SUV

Average monthly electricity Bill £

I acknowledge that Fit Solar is not providing a quote. It is a range to give me an idea of the system size and potential savings.

We're calculating your system size

Recommended System Size

To power your EV you'll require: kWh per day

based on current utility rate

per day

per month

per year

Estimating from your electricity bill, you require

To cover your existing utility bill + electric vehicle which is already being included in your monthly utility bill you need the following system size.

To cover your existing utility bill + future electric vehicle you will require:

Number of Panels:

System size:

Battery:

Potential savings:

Keep in Mind

This is for ideal situations, but you may need more or less panels

Keep in Mind

This is for ideal situations, but you may need more or less panels

Initial results are 100% offset. Your needs may vary. Try moving the slider to see additional options.

Current bill: New offset bill:

<100%>

Increase your offset to meet the minimum required kWh

Possible reasons to decrease:

Limited roof-space
Heavily shaded roof
Financial constraints/budget

Possible reasons to increase:

Adding electric vehicles or charging stations
Desire to use additional AC/heat/power
Planned renovation/expansion

Possible reasons to decrease:

Limited roof-space
Heavily shaded roof
Financial constraints/budget

Possible reasons to increase:

Adding electric vehicle
Desire to use additional AC/heat
Planned home renovation/expansion

Opt-in to receiving promotional messages. Don't worry, we won't share it with third parties.

Environmental Impact ( years)

metric tons

offset of your bill.

Number of Panels:

System size:

Battery:

Potential savings:

How do you plan on aquiring your system?

Cash Purchase

Financing

Lease

offset of your bill.

Number of Panels:

System size:

Battery:

Potential savings:

Your system is being calculated

Outright puchase

Available Incentives:
Cost Range of Your System
Payback Period (ROI): years

Financing (Loan)

Your new electric bill with solar per month :
Available Incentives:
Cost Range of Your System
:
Payback Period (ROI): years

Term:

Rate:

Credit Score:

Financing (Lease)

Your new electric bill with solar per month :

Term:

Rate:

Credit Score:

Environmental Impact
( years)

metric tons

I'd like to learn more about battery storage

offset of your bill.

Number of Panels:

System size:

Battery:

Potential savings:

Book your appointment

We always carry out a site survey to ensure you can get the best from your investment.

Please select one:

Call me

Virtual meeting / send a link

In person meeting

All personal information is confidential.

Pick a date

Pick time (Select date to get available slots)

Thanks

We look forward to speaking with you soon.

Step 1/

How the Solar Panel Calculator Works.

Our Solar Panel Calculator is designed to give you a quick, accurate estimate based on your specific needs. Simply enter details about your property, energy usage, and location, and the calculator will determine:

Number of panels needed: Based on your roof size and energy consumption.
System size: The total capacity of your solar panel system in kilowatts (kW).

Potential savings: How much you could save annually by generating your own electricity.
Carbon footprint reduction: The environmental impact of switching to solar energy.

Factors That Affect Your Solar Panel Needs.

Energy Usage

Your household’s or business’s annual energy consumption is a key factor. The more energy you use, the larger the system you'll need.

Roof Size and Orientation

We always take into account your roof’s size, shape, and orientation (south-facing roofs are ideal in the UK).

Sunlight Availability

While the UK isn’t known for its sunshine, solar panels still perform well here, especially in areas with minimal shading.

Battery Storage

Adding a solar battery can increase your savings by storing unused energy for later use.

How Much Money Can You Save with Solar Panels?

The savings depend on various factors, including energy usage, electricity tariffs, and government incentives. On average, UK households save between £850 and £1,300 annually on electricity bills. With solar batteries, you can maximise savings by using stored energy during peak rate hours. To find out how much you could save with a solar panel installation, use our Solar Panel Calculator above or visit our savings page!

Get Started Today!

Switching to solar power is one of the best ways to save money and reduce your carbon footprint. Use our Solar Panel Calculator now to find out how much you could save and how many panels you’ll need. Contact us for a free consultation and take the first step towards a brighter, more sustainable future.

What do our clients say?

Check out our Google reviews

After several proposals and quotes we chose Fit Solar to install our system, absolutely no regrets, cost effective,professional advice and installation by a considerate and capable team.

John Goodman

I was recommended by a friend to approach FitSolar for a quote to install a ten-panel solar system having already obtained quotes from four other local and national firms. Mark... read more

Mark Dickens
We have been really impressed with the quality of work carried out throughout the whole process of planning and fitting our Solar energy system. The team were organised, communicated well... read more

Nicola Price

I was recommended FIT Solar by another electrician. From the first contact they were timely, efficient and very knowledgeable. I followed their recommendations and I could not be happier with... read more

Paul Francis

Services

Solar Panel PV systems
Battery Storage
Commercial Solar
Off Grid Solar Systems
EV Chargers

Legal

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Company No 14421012

Contact us

	01453 705915
	startsaving@fitsolar.energy
	Unit E5, Inchbrook Trading Estate, Stroud, Gloucestershire, GL5 5EY

Copyright © 2025 I fitsolar.energy | Website by IceRocket Design

Services

Solar Panel PV systems
Battery Storage
Commercial Solar
Off Grid Solar Systems
EV Chargers

Legal

Cookie Policy
Privacy policy
Terms and conditions

Company No 14421012

Contact us

	01453 705915
	startsaving@fitsolar.energy
	Unit E5, Inchbrook Trading Estate, Stroud, Gloucestershire, GL5 5EY

Copyright © 2025 I fitsolar.energy | Website by IceRocket Design

01453 705915

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